Reel core and method for making the same



Sept 19, 1933. s. w. ALDERFl-:R t 1,927,197

REEL CORE AND METHOD FOR MAKING THE SAME Filed Jan. 30, 1931 INVENTOR erling w. Hlderer ATTORNEYS Patented Sept. iii, 1933 nnen conn AND Mn'rnon Foa Manilva A 'run SAME This invention relates to cores for rolls or reels of material such as fabric, paper, rubber stock or the like, and methods for making the same.

The general purpose of the invention is to provide a light but strong core for rolls of paper, fabric, rubber stock, etc., which is inexpensive to manufacture.

A further purpose of the invention is to provide such a core which may be formed with a polygcual opening through its axis so as to be nonrotatably mounted upon a polygonal shaft whereby winding o1' reeling of the material on or from the roll may be effectively accomplished.

A further purpose of the invention is to provide effective procedure for making such reel cores.

Heretcfore such cores have usually been made of wood or hollow cylinders of paper board material. rihe wooden core is fairly cheap unless a bore is required therethrough to mount it on a shaft which requires either boring a solid core or constructing the core in sections secured together so as to form the required opening through the axis of the core. The cylindrical paper board core, of course, requires the insertion of special supporting means if it is to be mounted upon a shaft to prevent rotation of the roll about the shaft.

The purposes of the present invention are attained in the roll core illustrated in the accompanying drawing and described below. It is to be understood that the invention has not been limited to the specific form thereof shown and described.

Of the accompanying drawing,

Figure i is a perspective View broken at the center to shorten it, illustrating the mthod of constructing core lengths;

Figure 2 is a section through a finished length of core;

Figure 3 is a perspective view of a core cut to desired length; and

Figure i is a side elevation of a reel of stock f wound upon the improved core and mounted upon a driven shaft.

Referring to the drawing, the numeral 10 designates a polygonal forming mandrel for use in making the improved reel core. in the manu- 50 facture of the reel core composite sheet paper material 11 is preferably employed, this material being of cellular construction such as provided by a iiat layer cf paper and a layer of corrugated paper secured together as with an adhesive such as glue, water glass or the like and preferably treated with such an adhesive on the surfaces thereof.

First, one or more convolutions of chipboard or the like 12 may be wrapped upon the form 10, this material being treated with the adhesive upon its outer surface and wound while the adhesive is tacky so that the convolutions will adhere together. Then the cellular material 11 treated with adhesive is wrapped about the material 12 while the adhesive is tacky. As the ma- 65 terial ll is wrapped about the mandrel 10 the cells 'thereof become crushed at the corners as at 13, 13 while the reel core gradually assumes a cylindrical exterior shape. Thereafter the material l1 is wrapped onto the mandrel until a core of the required sise is built. Preferably this core is covered with one or more convolutions 14 of chip board or the like with adhesive on its inner surface and wrapped while the adhesive is tacky about the material l1. The length of reel core thus made is finally removed from the mandrel 10 and the adhesive allowed to harden which stiifens the core structure.

The core length thus formed may be cut into reel cores 15 of any required length. The re- Sf sulting cores may be mounted on polygonal shafts 16 which may be driven as by sprocket and chain 17, 18 to reel stock 19 thereon or they may be mounted on shaits similar to 16 with which brakes (not shown) may be associated to control the reeling of stock 19 from the core.

The improved cores, of course, may be made with circular axial openings where the polygonal openings are not required, the core structure being of advantage in either type of core due to its lightness, strength and economy of manufacture.

Modifications of the invention may be resorted to Without departing from the spirit thereof or -l the scope of the appended claims.

What is Yclaimed is:--

1. That method for making reel cores which comprises wrapping one or more convolutions of plain paper material coated wth adhesive on the outside upon a polygonal mandrel, wrapping convolutions of cellular paper material coated with adhesive about said mandrel-so that the cells thereof crush at the corners of the mandrel whereby the core gradually assumes a circular a cylindrical shape until a core of the required size is obtained, and nally wrapping one or more convolutions of plain paper material coated with adhesive on the inside about said core.

2. That method for making reel cores which comprises Wrapping one or more convolutions of ilo plain paper material upon a polygonal mandrel, wrapping convolutions of cellular paper material about said mandrel so that the cells thereof crush at the corners of the mandrel whereby the core gradually assumes a circular cylindrical shape until a core of the required size is obtained, and nally Wrapping one or more convolutions of plain paper material about said core.

3, That method for making reel cores which comprises wrapping convolutions of cellular paper material coated with adhesive about a mandrel so that the cells thereof crush at the corners of the mandrel whereby the core gradually assumes a circular cylindrical shape until a core of the required size is obtained.

4. rFhat method .for making reel cores which comprises wrapping convolutions of cellular paper material about a mandrel so that the cells thereof crush at the corners of the mandrel whereby the core gradually assumes a circular cylindrical shape until a core of the required size is obtained.

5. A reel core having a polygonal axial opening comprising convolutions of cellular paper material, the cells of which are crushed adjacent the corners of said opening.

6. A reel core having an axial opening including one or more inner convolutions of plain paper material about the opening, superposed convolutions of composite paper material comprising a layer of plain paper and a layer of corrugated paper about the inner convolutions, and outer convolutions of plain paper material about the composite material, said paper material being treated with an adhesive adapted to stiffen when dry.

7. A reel core having an axial opening includ* ing one or more inner convolutions of plain paper material about the opening, convolutions of cellular paper material about the inner convolutions, and outer convolutions of plain paper material about the cellular material, said opening being polygonal and the cells of said cellular paper material being crushed adjacent the corners of said opening.

STERLING W. ALDERFER.

Mil 

